98557 has 4 divisors (see below), whose sum is σ = 100096. Its totient is φ = 97020.

The previous prime is 98543. The next prime is 98561. The reversal of 98557 is 75589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75589 = 269 ⋅281.

It is a cyclic number.

It is not a de Polignac number, because 98557 - 2⁷ = 98429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (25024).

2⁹⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

98557 is a deficient number, since it is larger than the sum of its proper divisors (1539).

98557 is a wasteful number, since it uses less digits than its factorization.

98557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538.

The product of its digits is 12600, while the sum is 34.

The square root of 98557 is about 313.9378919468. The cubic root of 98557 is about 46.1915453379.

The spelling of 98557 in words is "ninety-eight thousand, five hundred fifty-seven".